Names of Triangles and Angles

Date: 07/25/2001 at 11:19:59
From: Aaron
Subject: Names of Triangles and Angles
Dear Doctor Math,
My teacher told me to find names of triangles other than equilateral
and isosceles. What more can I find?

Date: 07/25/2001 at 12:15:16
From: Doctor Peterson
Subject: Re: Names of Triangles and Angles
Hi, Aaron.
In terms of the sides of a triangle, there are three cases:
Equilateral: all three sides equal
Isosceles: (at least) two sides equal
Scalene: no sides equal
In terms of the angles, there are also three cases:
Right: one right angle, two acute
Acute: three acute angles
Obtuse: one obtuse, two acute angles
Can you see why there are no other possibilities?
You can find four of these six types of triangles illustrated in our
FAQ on Formulas:
http://mathforum.org/dr.math/faq/formulas/faq.triangle.html
- Doctor Peterson, The Math Forum
http://mathforum.org/dr.math/